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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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90ef3e4835
sha1-generic had a cra_priority of 0, so it wasn't possible to have a lower priority SHA-1 implementation, as is desired for sha1_mb which is only useful under certain workloads and is otherwise extremely slow. Change it to priority 100, which is the priority used for many of the other generic algorithms. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
/*
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* Cryptographic API.
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*
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* SHA1 Secure Hash Algorithm.
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*
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* Derived from cryptoapi implementation, adapted for in-place
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* scatterlist interface.
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*
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* Copyright (c) Alan Smithee.
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* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
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* Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#include <crypto/internal/hash.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/cryptohash.h>
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#include <linux/types.h>
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#include <crypto/sha.h>
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#include <crypto/sha1_base.h>
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#include <asm/byteorder.h>
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const u8 sha1_zero_message_hash[SHA1_DIGEST_SIZE] = {
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0xda, 0x39, 0xa3, 0xee, 0x5e, 0x6b, 0x4b, 0x0d,
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0x32, 0x55, 0xbf, 0xef, 0x95, 0x60, 0x18, 0x90,
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0xaf, 0xd8, 0x07, 0x09
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};
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EXPORT_SYMBOL_GPL(sha1_zero_message_hash);
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static void sha1_generic_block_fn(struct sha1_state *sst, u8 const *src,
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int blocks)
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{
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u32 temp[SHA_WORKSPACE_WORDS];
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while (blocks--) {
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sha_transform(sst->state, src, temp);
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src += SHA1_BLOCK_SIZE;
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}
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memzero_explicit(temp, sizeof(temp));
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}
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int crypto_sha1_update(struct shash_desc *desc, const u8 *data,
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unsigned int len)
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{
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return sha1_base_do_update(desc, data, len, sha1_generic_block_fn);
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}
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EXPORT_SYMBOL(crypto_sha1_update);
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static int sha1_final(struct shash_desc *desc, u8 *out)
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{
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sha1_base_do_finalize(desc, sha1_generic_block_fn);
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return sha1_base_finish(desc, out);
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}
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int crypto_sha1_finup(struct shash_desc *desc, const u8 *data,
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unsigned int len, u8 *out)
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{
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sha1_base_do_update(desc, data, len, sha1_generic_block_fn);
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return sha1_final(desc, out);
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}
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EXPORT_SYMBOL(crypto_sha1_finup);
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static struct shash_alg alg = {
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.digestsize = SHA1_DIGEST_SIZE,
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.init = sha1_base_init,
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.update = crypto_sha1_update,
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.final = sha1_final,
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.finup = crypto_sha1_finup,
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.descsize = sizeof(struct sha1_state),
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.base = {
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.cra_name = "sha1",
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.cra_driver_name= "sha1-generic",
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.cra_priority = 100,
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.cra_flags = CRYPTO_ALG_TYPE_SHASH,
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.cra_blocksize = SHA1_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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};
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static int __init sha1_generic_mod_init(void)
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{
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return crypto_register_shash(&alg);
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}
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static void __exit sha1_generic_mod_fini(void)
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{
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crypto_unregister_shash(&alg);
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}
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module_init(sha1_generic_mod_init);
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module_exit(sha1_generic_mod_fini);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");
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MODULE_ALIAS_CRYPTO("sha1");
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MODULE_ALIAS_CRYPTO("sha1-generic");
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